ThePog Posted April 3, 2021 Share Posted April 3, 2021 Yo, quick question. I have a jvc head unit kw-m150bt. It has 4 wires for the steering wheel control stuff. In the manual these are grouped as two programmable signal wires and a ground, then another wire labelled as 'steering remote control wire' As the volume controls are on the screen and not that easy to use, I want to set up two momentary switches on the dash and program them as up and down volume. I should be able to get the up and down using the simple circuit on this page; https://www.hackster.io/SetNFix/diy-car-steering-wheel-controller-with-volume-control-1b201b So the question is what do I do with that control wire? Is it just connected to the acc circuit or do I just ignore it? Quote Link to comment Share on other sites More sharing options...
AllTorque Posted April 3, 2021 Share Posted April 3, 2021 I think you would use the one in the left or the three on the right , but not all. Factory fitted steering wheel controls (in Toyota at least) Have one output. Each button has a different resistor, so the stereo sees a different voltage for each button and knows what to do. Quote Link to comment Share on other sites More sharing options...
ThePog Posted April 3, 2021 Author Share Posted April 3, 2021 3 minutes ago, AllTorque said: I think you would use the one in the left or the three on the right , but not all. Factory fitted steering wheel controls (in Toyota at least) Have one output. Each button has a different resistor, so the stereo sees a different voltage for each button and knows what to do. Alright, that make sense now. The group of 3 are customisable in the head unit, so I probably just need one resistance between them.... Quote Link to comment Share on other sites More sharing options...
AllTorque Posted April 3, 2021 Share Posted April 3, 2021 They may not even need a resistor. Quote Link to comment Share on other sites More sharing options...
ThePog Posted April 3, 2021 Author Share Posted April 3, 2021 43 minutes ago, AllTorque said: They may not even need a resistor. Yea, turns out if I ground out one or the other I can program volume up and down, I guess I can get technical with play pause later if I get excited. Cheers for the help.... 1 Quote Link to comment Share on other sites More sharing options...
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